Viridian City
- Tentacool, Poliwag

Route 22
- Goldeen, Poliwag

Cerulean City, Cerulean Gym, Routes 4, 24, and 25
- Goldeen, Psyduck, Krabby

Vermilion City, Routes 6, 11
- Shellder, Krabby

Safari Zone
- Psyduck, Krabby, Slowpoke, Dratini

Celadon City, Route 10
- Poliwhirl, Slowpoke

Route 12, 13, 17, 18
- Tentacool, Krabby, Goldeen, Magikarp

Cinnabar Island, Seafoam Island, Routes 19, 20, 21
- Staryu, Horsea, Goldeen, Shellder

Unknown Dungeon, Route 23
- Slowbro, Seaking, Kingler, Seadra

Fuchsia City
- Seaking, Krabby, Goldeen, Magikarp